leetcode-problemset/leetcode-cn/problem (English)/移除重复节点(English) [remove-duplicate-node-lcci].html

<p>Write code to remove duplicates from an unsorted linked list.</p>

<p><strong>Example1:</strong></p>

<pre>
<strong> Input</strong>: [1, 2, 3, 3, 2, 1]
<strong> Output</strong>: [1, 2, 3]
</pre>

<p><strong>Example2:</strong></p>

<pre>
<strong> Input</strong>: [1, 1, 1, 1, 2]
<strong> Output</strong>: [1, 2]
</pre>

<p><strong>Note: </strong></p>

<ol>
	<li>The length of the list is within the range[0, 20000].</li>
	<li>The values of the list elements are within the range [0, 20000].</li>
</ol>

<p><strong>Follow Up: </strong></p>

<p>How would you solve this problem if a temporary buffer is not allowed?</p>